net-p2p/jackett: update to 0.21.826

ChangeLog: https://github.com/Jackett/Jackett/releases

• gay-torrents: add config option to strip release date from query.
• mazepa: add new cat
• megamixtracker: lint
• megamixtracker: new MR and MST

PR: 273921
Reported by: tremere@cainites.net (maintainer)